Knoxville Regional ITS Architecture

Roadway Signal Preemption Functional Area

Description

'Roadway Signal Preemption' includes the field elements that receive signal preemption requests from emergency vehicles approaching a signalized intersection and overrides the current operation of the traffic signals to stop conflicting traffic and grant right–of–way to the approaching vehicle.

Included In

Blount County Traffic Signals
City of Alcoa Traffic Signals
City of Knoxville Traffic Signals
City of Lenoir City Traffic Signals
City of Maryville Traffic Signals
City of Oak Ridge Traffic Signals
City of Sevierville Traffic Signals
Knox County Traffic Signals
Loudon County Traffic Signals
Municipal Traffic Signals
Town of Farragut Traffic Signals

Functional Requirements

ID	Requirement
01	The field element shall respond to signal preemption requests from emergency vehicles.
02	The field element shall inform the controlling center when preemption requests have been received.
03	The field element shall send the preemption request to the signal controller to immediately preempt the signal for the requested direction.